87723787 has 2 divisors, whose sum is σ = 87723788. Its totient is φ = 87723786.

The previous prime is 87723751. The next prime is 87723803. The reversal of 87723787 is 78732778.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87723787 - 2⁷ = 87723659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87723787.

It is not a weakly prime, because it can be changed into another prime (87723187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43861893 + 43861894.

It is an arithmetic number, because the mean of its divisors is an integer number (43861894).

Almost surely, 2^87723787 is an apocalyptic number.

87723787 is a deficient number, since it is larger than the sum of its proper divisors (1).

87723787 is an equidigital number, since it uses as much as digits as its factorization.

87723787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 921984, while the sum is 49.

The square root of 87723787 is about 9366.0977466606. The cubic root of 87723787 is about 444.3301574729.

The spelling of 87723787 in words is "eighty-seven million, seven hundred twenty-three thousand, seven hundred eighty-seven".